(3) pieces "Square D" brand buck/ boost transformers, meant to convert utility level voltage 120/ 240 into necessary low voltage of 12/ 24 volts, these are very flexible and durable devices which came out of a 3 phase install for printing equipment, only one electrical conduit access hole has been cut in each, enclosure is rated for either indoor or outdoor installations, load rating is .500 kVa (approximately 500 watts), price is $60.00 for each transformer, call/text Doug